12.3
Troubleshooting
12-7
12.3.3 LED Indicators
( 1 ) LED Indicators
( 2 ) LED Indicator Meanings
The following table shows how to use the LED indicators to determine the operating status of the
MP2300, as well as relevant error information when the LED indicator status indicates an error.
The status of the LED indicators on the front of the MP2300 can be used to determine the error
status and meaning.
The locations in the program that need to be corrected can be determined by using the LED
indicator status to determine the general nature of the error, using the contents of system (S)
registers to check drawings and function numbers causing the error, and knowing the meaning
of operation errors.
RDY
ERR
TRX
RUN
ALM
BAT
Classification
LED Indicator
Indicator Details Countermeasures
RDY RUN ALM ERR BAT
Normal
operation
Not lit Not lit Lit Lit Not lit Hardware reset status
Usually the CPU will start within
10 seconds. If this status continues for
more than 10 seconds, either a
program error or hardware failure has
occurred. Refer to 12.4 Troubleshoot-
ing System Errors on page 12-9 and
correct any system errors.
Not lit Not lit Not lit Not lit Not lit Initialization
Not lit Lit Not lit Not lit Not lit
Drawing A (DWG.A) being executed.
Lit Not lit Not lit Not lit Not lit
User program stopped.
(Offline Stop Mode)
This status occurs
• When the stop operation is executed
from the MPE720
• When the STOP switch is turned
ON
This status does not indicate an error.
Lit Lit Not lit Not lit Not lit
User program being executed
normally.
This is the normal status.
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